Granted Patent
Utility
US 5,142,252 · App. 07/602,493
Audio signal transmission line with a low pass filter
Inventor:
Bruce A. Brisson
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Oct 24, 1990
Inventor
Bruce A. Brisson
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.